Old Stone · Pizza Stones & Baking Surfaces
Amazon.com: Old Stone Pizza Kitchen Rectangular Pizza Stone for Oven and Grill, 14x16-Inch : Patio, Lawn & Garden, Is It Non-Toxic?
Lower concern. Pizza stones are typically bare ceramic with no coatings.
Pizza stones are traditionally made from uncoated cordierite ceramic or similar minerals. Old Stone does not disclose coating details, but the product category carries lower PFAS risk due to bare material use.
We flunk more products than we pass. This one earned its grade. How we grade
Material
cordierite ceramic stone
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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Is Amazon.com: Old Stone Pizza Kitchen Garden non-toxic? What it is made of
This product is cordierite ceramic, a dense mineral composite engineered for thermal shock resistance and high-temperature cooking. Cordierite contains magnesium, aluminum, and silica, and is chemically inert when unglazed and unmolded. The stone's porous structure absorbs moisture during preheating, which then converts to steam, crisping pizza bottoms. No adhesive binders, glazes, or surface coatings are mentioned in standard product descriptions for this type, meaning leaching of lead, cadmium, or degradation of applied finishes is not a recognized concern for bare cordierite pizza stones.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Ceramic cracking and fragmentation
Cordierite pizza stones are engineered for thermal shock tolerance but can crack under sudden temperature changes (e.g., cold water on hot stone) or if struck; small fragments ingested with food are a choking or intestinal concern. This is a use-related hazard, not a material defect.
Mold or bacterial growth in porous surface
The porous cordierite surface can trap moisture and food residue if not dried thoroughly after cleaning or storage in damp conditions. Mold or bacteria growth is preventable through proper air drying and storage in a dry environment, not inherent to the material.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Lead
Bare cordierite pizza stones typically contain no decorative glaze or surface treatment where lead or cadmium might be used. No recalls or test results on record for Old Stone brand. Risk is negligible for unglazed cordierite from established cookware manufacturers.
Source, ATSDR ↗Aluminum leaching
While cordierite contains aluminum as a structural component, it is chemically locked in the crystalline lattice and does not leach into food under normal cooking conditions. No established evidence of aluminum migration from pizza stones into food.
Coating degradation or flaking
No adhesive, glaze, or surface coating is described for this bare cordierite stone, so coating wear and flaking are not applicable hazards. The stone's surface itself may develop small surface cracks from use but does not shed particles.
How is this PFAS grade calculated?
The brand's record and disclosure
Old Stone is a private label brand with no published safety certifications, third-party testing disclosures, or material safety statements readily available in public records. The brand has no established history of recalls, safety controversies, or regulatory action related to this product line. Absence of disclosure does not indicate a hazard, but reflects the minimal regulatory scrutiny applied to bare ceramic cooking surfaces in the U.S. market.
How it compares in its category
Cordierite pizza stones are a standard, widely used category of cookware and represent a lower-hazard option compared to nonstick coated surfaces (which carry Teflon-type coating fume risk) or glazed ceramics (which may contain lead or cadmium in decoration). This rectangular 14x16 format is typical; alternatives include clay, steel, or composite stones, all of which share similar thermal properties and lack applied coatings. Cordierite is among the most stable ceramic choices for direct flame or high oven exposure.
If you buy it
Preheat the stone in a cold oven and heat gradually to avoid thermal shock cracking; do not use water to cool it rapidly. The porous surface will absorb odors and oils over time; this is normal and does not indicate degradation or leaching. Inspect annually for deep cracks or spalling (flaking) of the surface; replace if large cracks develop. Do not use soap or abrasive scrubbers; wipe with a dry cloth or use a plastic scraper to remove stuck food.
What is not known about PFAS in this product?
- Basis
- Model estimate, 85% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Old Stone has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Amazon.com: Old Stone Pizza Kitchen Rectangular Pizza Stone for Oven and Grill, 14x16-Inch : Patio, Lawn & Garden?
15-Inch Ceramic Pizza Stone for Perfect Crispy Crusts
- Ceramic (clay-based baking stone)
- The brand calls it PFAS-free, which we have not verified
- Glaze degradation and surface leaching
3 hazards checked on this product, all on its full breakdown.
Deluxe Square Pizza Stone with Rack
- ceramic or unglazed stone; no nonstick coating
- The brand calls it PFAS-free, which we have not verified
- Ceramic or stone cracking and fragmentation
2 hazards checked on this product, all on its full breakdown.
More pizza stones & baking surfaces grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.